Parked just feet from their home (left), and too heavily damaged
to determine accidental or intentional cause, the Jeep was engulfed in flames by
the time fire crews arrived, the Columbia Daily Tribune reported. The
Fire Marshal has ruled the cause "inconclusive."

The lingering uncertainty has De-Foe Thomas -- who
ruled out recalls and defects -- looking over her shoulder.

Spooked by the first question fire marshals asked fiance David Ursery -- "Do you have any enemies?" -- De-Foe Thomas said she "wants to
be careful" about how -- or to whom -- she attributes the blaze.

"If this was a random mechanical failure, I want to
know, so I can at least breathe easy," De-Foe Thomas said. "If there
is someone after me or us for our outspokenness on the SWAT issue, or other
things we've voiced public opinion on -- I just want to know if my fears are
warranted."

De-Foe Thomas said she and Ursery (both, right) -- the Jeep's registered
owner -- last drove the vehicle about 5 hours before it went up in
smoke. Neither smokes cigarettes, but the fire apparently started in
the cab.

"A witness who lives on an adjacent street heard several
'bangs,' and saw the initial flames from his bedroom window. By the time he had
his shoes on and was out the door, the fire had engulfed the majority of the
cab," De-Foe Thomas told the Heart Beat.

The suspicious fire has left other experts scratching
their heads. "I've spoken to a couple of mechanics, and even someone from
Carfax," De-Foe Thomas (right) explained. "The overall conclusion -- without physically
seeing the car -- is that for such a large fire to occur and build so quickly,
and considering the other evidence as well, this was
intentional."

Though she has suspicions otherwise, "random teenage arson
is always a possibility," she added.